20 year old girl looking for accommodation in Frankfurt, 20-45 minutes far from ISM

I'm a french student and I'm going to study one year in ISM so I'm looking for a room or a little appartement with a double bed. If it's possible not so far from the ISM. I'm a smooker but I don't smooke inside a house because of the smells which I totally dislike so it should not be a problem. I already lived in border-school so shared appartements are not a problem for me and I know the rules of living in community.